linux-kernel - Re: [v2, 0/4] x86 instruction emulator fuzzing

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Date:   Fri, 21 Jun 2019 15:30:11 +0200
From:   Alexander Graf <graf@...zon.com>
To:     Sam Caccavale <samcacc@...zon.de>
CC:     <samcaccavale@...il.com>, <nmanthey@...zon.de>,
        <wipawel@...zon.de>, <dwmw@...zon.co.uk>, <mpohlack@...zon.de>,
        <graf@...zon.de>, <karahmed@...zon.de>,
        <andrew.cooper3@...rix.com>, <JBeulich@...e.com>,
        <pbonzini@...hat.com>, <rkrcmar@...hat.com>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <bp@...en8.de>, <hpa@...or.com>,
        <paullangton4@...il.com>, <anirudhkaushik@...gle.com>,
        <x86@...nel.org>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [v2, 0/4] x86 instruction emulator fuzzing


On 12.06.19 17:35, Sam Caccavale wrote:
> Dear all,
>
> This series aims to provide an entrypoint for, and fuzz KVM's x86 instruction
> emulator from userspace.  It mirrors Xen's application of the AFL fuzzer to
> it's instruction emulator in the hopes of discovering vulnerabilities.
> Since this entrypoint also allows arbitrary execution of the emulators code
> from userspace, it may also be useful for testing.
>
> The current 4 patches build the emulator and 2 harnesses: simple-harness is
> an example of unit testing; afl-harness is a frontend for the AFL fuzzer.
>
> Patches
> =======
>
> - 01: Builds and links afl-harness with the required kernel objects.
> - 02: Introduces the minimal set of emulator operations and supporting code
> to emulate simple instructions.
> - 03: Demonstrates simple-harness as a unit test.
> - 04: Adds scripts for install, running, and crash triage.
>
> Any comments/suggestions are greatly appreciated.


The cover letter as well as the individual patches are missing a change 
log from v1 to v2.



Alex